Orestes
Cyclopedia of Biblical, Theological and Ecclesiastical Literature [1]
( Ο᾿Ρέστης ), a Christian physician of Tyana, in Cappadocia, called also Arestes, suffered martyrdom during the persecution under Diocletian, A.D. 303, 304. An interesting account of his tortures and death is given by Simeon Metaphrastes (ap. Suriam, De Probat. Sancto: Histor. 6, 231), where he is named Aresters. See also Menolog. Graec. 1:178 (ed. Urbin. 1727). Orestes has been canonized by the Greek and Roman churches, and his memory is celebrated on Nov. 9. See Bzovius, Nomenclator Sanctor. Profess. Medicor.
The Nuttall Encyclopedia [2]
The son of Agamemnon and Clytemnestra, and brother of Electra and Iphigenia, who killed his mother to avenge the murder by her of his father and went mad afterwards, but was acquitted by the Areopagus and became king of Argos and Lacedæmon; his friendship for Pylades, who married his sister Electra, has passed into a proverb; the tragic story is a favourite theme of the Greek tragedians.